On Board Diagnosis Logic
The ECM checks if battery voltage is within the tolerance range for the engine control system.
Malfunction is detected when ... Check Items (Possible Cause)
IAn abnormally high voltage from the battery is sent to ECM.IIncorrect jump starting
IBattery
IAlternator
IECM
DTC Confirmation Procedure
With CONSULT-II
1) Check the following.
IJumper cables are connected for jump starting.
IBattery or alternator has been replaced.
If the result is ªYesº for one item or more, skip the following steps and go to ªDiagnostic Procedureº,
EC-153.
2) Check that the positive battery terminal is connected to battery properly. If NG, reconnect it properly.
3) Check that the alternator functions properly. Refer to EL section (ªCHARGING SYSTEMº).
4) Turn ignition switch ªONº and select ªDATA MONITORº mode with CONSULT-II.
5) Wait one minute.
6) If DTC is detected, go to ªDiagnostic Procedureº, EC-153.
If DTC is not detected, go to next step.
7) Start engine and wait one minute at idle.
8) If DTC is detected, go to ªDiagnostic Procedureº, EC-153.
Without CONSULT-II
1) Check the following.
IJumper cables are connected for jump starting.
IBattery or alternator has been replaced.
If the result is ªYesº for one item or more, skip the following steps and go to ªDiagnostic Procedureº,
EC-153.
2) Check that the positive battery terminal is connected to battery properly. If NG, reconnect it properly.
3) Check that the alternator functions properly. Refer to EL section (ªCHARGING SYSTEMº).
4) Turn ignition switch ªONº and wait one minute.
5) Turn ignition switch ªOFFº, wait 5 seconds and then turn ªONº.
6) Perform ªDiagnostic Test Mode II (Self-diagnostic result)º with ECM.
7) If DTC is detected, go to ªDiagnostic Procedureº, EC-153.
If DTC is not detected, go to next step.
8) Start engine and wait one minute at idle.
9) Turn ignition switch ªOFFº, wait 5 seconds and then turn ªONº.
10) Perform ªDiagnostic Test Mode II (Self-diagnostic result)º with ECM.
11) If DTC is detected, go to ªDiagnostic Procedureº, EC-153.
Diagnostic Procedure
1 INSPECTION START
Are jumper cables connected for the jump starting?
YesorNo
Ye sEGO TO 3.
NoEGO TO 2.
DTC 0502 BATTERY VOLTAGEZD30DDTi
EC-153
2 CHECK BATTERY AND ALTERNATOR
Check that the proper type of battery and alternator is installed.
Refer to EL section (ªBATTERYº and ªCHARGING SYSTEMº).
OK or NG
OKEGO TO 5.
NGEReplace with a proper one.
3 CHECK JUMPER CABLES INSTALLATION
Check that the jumper cables are connected in the correct sequence.
MEC999D
OK or NG
OKEGO TO 4.
NGEReconnect jumper cables properly.
4 CHECK BATTERY FOR BOOSTER
Check that the battery for the booster is a 12V battery.
OK or NG
OKEGO TO 5.
NGEChange the vehicle for booster.
5 PERFORM DTC CONFIRMATION PROCEDURE AGAIN
Perform ªDTC Confirmation Procedureº, EC-153, again.
OK or NG
OKEGO TO 6.
NGEReplace ECM.
6 CHECK ELECTRICAL PARTS DAMAGE
Check the following for damage.
IWiring harness and harness connectors for burn
IFuses for short
OK or NG
OKEINSPECTION END
NGERepair or replace malfunctioning part.
DTC 0502 BATTERY VOLTAGEZD30DDTi
Diagnostic Procedure (Cont'd)
EC-154
ENGINE ROOM HARNESS LHD MODELS
GROUND CONNECT TOCONN.
NO.CELL CODE
E222/E224 4WD SWITCH (ZD30DDTi) E212 EL-WARN
ACCELERATOR SWITCH F94 EC-AAC/SW
DATA LINK CONNECTOR F115 EC-MIL/DL
ECM F123EC-MAIN, EC-MAFS, EC-VSS,
EC-APS, EC-CKPS, EC-MIL/DL
ELECTRONIC CONTROL FUEL INJECTION E232 EC-INJPMP
HEAT UP SWITCH F116 EC-HEATUP
MASS AIR FLOW SENSOR F91 EC-MAFS
NATS IMMU (ZD30DDTi) F58 EL-NATS
PARK/NEUTRAL POSITION SWITCH E213 EC-PNP/SW
SHIELD WIRE (ACCELERATOR POSITION SENSOR) F96 EC-APS, AT-TPS
SHIELD WIRE (CHARGE AIR PRESSURE SENSOR) E223 EC-BOOST
SHIELD WIRE [CRANKSHAFT POSITION SENSOR (TDC)] E229 EC-CKPS
TCM (TRANSMISSION CONTROL MODULE) M814 AT-MAIN
TRANSFER NEUTRAL POSITION SWITCH E213 EL-WARN
VEHICLE SPEED SENSOR E209 EC-VSS, AT-VSSMTR, EL-METER
E154 ALTERNATOR (TD27Ti) E153 SC-CHARGE
E203/E221 ALTERNATOR (ZD30DDTi) E214 SC-CHARGE
ENGINE ROOM HARNESS RHD MODELS
GROUND CONNECT TOCONN.
NO.CELL CODE
E222/E224 4WD SWITCH (ZD30DDTi) E212 EL-WARN
ACCELERATOR SWITCH M193 EC-AAC/SW
DATA LINK CONNECTOR M832 EC-MIL/DL
DONGLE CONTROL UNIT (ZD30DDTi) M720 EL-AUDIO, EL-NATS
ECM M841EC-MAIN, EC-MAFS, EC-VSS,
EC-APS, EC-CKPS, EC-MIL/DL
ELECTRONIC CONTROL FUEL INJECTION PUMP E232 EC-INJPMP
MASS AIR FLOW SENSOR F91 EC-MAFS
NATS IMMU (ZD30DDTi) M831 EL-NATS
PARK/NEUTRAL POSITION SWITCH E213 EC-PNP/SW
SHIELD WIRE (ACCELERATOR POSITION SENSOR) M191 EC-APS, AT-TPS
SHIELD WIRE (CHARGE AIR PRESSURE SENSOR) E223 EC-BOOST
SHIELD WIRE [CRANKSHAFT POSITION SENSOR (TDC)] E229 EC-CKPS
TCM (TRANSMISSION CONTROL MODULE) M814 AT-MAIN
TRANSFER NEUTRAL POSITION SWITCH E213 EL-WARN
VEHICLE SPEED SENSOR E209 EC-VSS, AT-VSSMTR, EL-METER
E154 ALTERNATOR (TD27Ti) E153 SC-CHARGE
E203/E221 ALTERNATOR (ZD30DDTi) E214 SC-CHARGE
GROUND DISTRIBUTION
EL-21
Trouble Diagnoses
Symptom Possible cause Repair order
Radio inoperative (no digital
display and no sound from
speakers).1. 10A Fuse
2. Poor radio case ground
3. Radio1. Check 10A fuse [No.
3 , located in fuse block (J/B)].
Turn ignition switch ON and verify battery positive volt-
age is present at terminalq
3of radio.
2. Check radio case ground.
3. Remove radio for repair.
Radio controls are
operational, but no sound is
heard from any speaker.1. Radio output
2. Radio1. Check radio output voltages.
2. Remove radio for repair.
Radio presets are lost when
ignition switch is turned OFF.1. 15A fuse
2. Radio1. Check 15A fuse [No.
35 , located in fuse and fusible
box] and verify battery positive voltage is present at
terminalq
9of radio.
2. Remove radio for repair.
Individual speaker is noisy or
inoperative.1. Speaker
2. Radio output
3. Speaker circuit
4. Radio1. Check speaker.
2. Check radio output voltages.
3. Check wires for open or short between radio and
speaker.
4. Remove radio for repair.
Radio stations are weak or
noisy.1. Antenna
2. Poor radio ground
3. Radio1. Check antenna.
2. Check radio ground.
3. Remove radio for repair.
Radio generates noise in AM
and FM modes with engine
running.1. Poor radio ground
2. Loose or missing ground bonding
straps
3. Ignition condenser or rear window
defogger noise suppressor con-
denser
4. Alternator
5. Ignition coil or secondary wiring
6. Radio1. Check radio ground.
2. Check ground bonding straps.
3. Replace ignition condenser or rear window defogger
noise suppressor condenser.
4. Check alternator
5. Check ignition coil and secondary wiring.
6. Remove radio for repair.
Radio generates noise in AM
and FM modes with accesso-
ries on (switch pops and
motor noise).1. Poor radio ground
2. Antenna
3. Accessory ground
4. Faulty accessory1. Check radio ground.
2. Check antenna.
3. Check accessory ground.
4. Replace accessory.
AUDIO
EL-124
Removal
1. Remove the engine assembly.
Refer to ªENGINE REMOVALº, EM-63.
2. Place the engine on an engine stand (SST).
Refer to ªCYLINDER BLOCKº, EM-67.
3. Remove the following.
IAuto tensioner bracket
IAir conditioner bracket
IAlternator bracket
IOil tube
IVacuum pump
IRocker cover
IOil pan (upper, lower)
IInjection tube
ISpill tube
IHigh pressure nozzle assembly
4. Remove the chain cover, timing chain and other parts in con-
nection.
Before removing timing chain, remove injection pump sprocket
with No. 1 cylinder being positioned at TDC. Refer to the fig-
ure. Refer to ªTIMING CHAINº, EM-26.
CAUTION:
After removing timing chain, never rotate crankshaft, or the
piston will push the valve up and damage the valve.
IDo not paint the match mark on the timing chain beforehand as
the No. 1 cylinder is set at the TDC during assembly.
5. Remove the TDC sensor.
CAUTION:
IDo not drop or hit the sensor.
IStore in a clean place free of iron filings, etc.
IDo not place near any magnetic equipment.
6. Remove the water pump.
Refer to ªWATER PUMPº in LC section.
7. Remove the water inlet.
SEM376G
TIMING GEARZD
EM-39
Engine room (Left)
3. Remove air duct and air cleaner case.
4. Disconnect vacuum hose to the vehicle on the engine.
5. Disconnect harness connectors from alternator and air com-
pressor.
6. Remove alternator.
7. After removing refrigerant, remove pipes of air compressor and
inlet/outlet.
8. Disconnect heating hose, install blank cap to hose to prevent
coolant from leaking.
9. Remove heating pipe.
10. Remove heat insulator.
11. Remove catalytic converter.
Engine room (Right)
12. Remove power steering reservoir tank from bracket, and fix it
to the vehicle with a rope.
CAUTION:
Keep the reservoir tank level when fixing to prevent oil leak.
13. Remove fuel feed and return hoses.
CAUTION:
Install blank caps immediately to avoid fuel leakage.
14. Remove all harness connectors on the engine, and move har-
nesses to the side of the vehicle.
Vehicle underfloor
15. Remove starter motor.
16. Detach A/T oil cooler pipes from oil pan. (A/T model)
17. Remove rear propeller shaft.
18. Remove mounting bolts to secure the engine to transmission.
1) Remove torque converter installation bolt. (A/T model)
2) Lift transmission bottom with transmission jack, and remove
rear mount members from the vehicle.
3) Lower transmission with the jack, and remove upper mounting
bolts securing the engine to transmission.
4) Lift transmission with the jack, and reinstall rear mount mem-
bers to the vehicle.
5) Position the jack to the front side of transmission.
6) Remove remaining mounting bolts securing the engine to trans-
mission.
Removal operation
19. Remove air conditioner high pressure pipes at the rear of the
engine room.
IThis is due to some inconvenience in the rear slinger installa-
tion.
20. Install the engine slingers (standard service part) to front-left
and rear-right.
:25-28N×m (2.5 - 2.9 kg-m, 18 - 20 ft-lb)
WARNING:
For engines without engine slingers, attach proper slingers
and bolts described in the PARTS CATALOG.
FEM082
ENGINE REMOVALZD
Removal (Cont'd)
EM-64
q1Injection tube
q
2Spill tube
q
3Injection nozzleq
4Engine slinger
q
5Oil filter bracket
q
6Oil filterq
7Alternator adjusting bar & engine
slinger
q
8Turbocharger
q
9Exhaust manifold
NEM344
ENGINE COMPONENTS Ð Outer PartsTD27Ti
EM-101
Removal
1. Set No. 1 cylinder at TDC on its compression stroke.
2. Drain engine coolant from drain plugs on cylinder block and
radiator.
3. Remove air cleaner and intercooler components.
4. Remove the following parts:
Ð Water temperature connectors
Ð Throttle chamber vacuum hoses
Ð EGR valve vacuum hose
Ð Connectors located on the intake manifold
Ð Connector located on the thermostat housing
Ð Heater tubes
Ð Connectors of the injection pump
5. Remove alternator adjusting bolt.
6. Disconnect exhaust manifold from front exhaust tube.
7. Remove turbocharger oil and water tubes.
8. Remove turbocharger bracket bolts.
9. Disconnect radiator outlet hose and thermostat housing water
inlet hose.
10. Remove fuel injection tube assembly and spill tube.
11. Remove injection nozzle holder from first cylinder with a spe-
cial tool (KV119E0030). Remove injection nozzles from cylin-
ders 2, 3 and 4 using a deep socket wrench.
12. Remove thermostat housing bolts shown at left.
13. Remove rocker cover and ventilation hose.
14. Remove rocker shaft with rocker arms.
15. Remove push rods.
16. Remove cylinder head bolts in numerical order and remove
cylinder head.
Head warpage or cracking could result from removing in incor-
rect order.
EEM092
SEM621B
EEM103
SEM623B
CYLINDER HEADTD27Ti
EM-105